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Financial Statement Presentation Cash, Cash Equivalents, and Restricted Cash (Tables)
9 Months Ended
Sep. 30, 2020
Cash and Cash Equivalents [Abstract]  
Schedule of Cash and Cash Equivalents [Table Text Block]
Cash, Cash Equivalents, and Restricted Cash The following table provides a summary of cash, cash equivalents, and restricted cash amounts reported on the Condensed Consolidated Balance Sheet that reconcile to the total of such amounts as shown on the Condensed Consolidated Statements of Cash Flows (in millions):
September 30, 2020December 31, 2019
Cash and cash equivalents$1,505 $1,029 
Restricted cash374 336 
Debt service reserves and other deposits502 207 
Cash, Cash Equivalents, and Restricted Cash$2,381 $1,572